APA Style

Penna, Richard P. (1979). Handbook of Nonprescription Drugs (6th.ed). Washington: American Pharmaceutical Association.

Chicago Style

Penna, Richard P. Handbook of Nonprescription Drugs. 6th.ed Washington: American Pharmaceutical Association, 1979. Textbook.

MLA Style

Penna, Richard P. Handbook of Nonprescription Drugs. 6th.ed Washington: American Pharmaceutical Association, 1979. Textbook.

Turabian Style

Penna, Richard P. Handbook of Nonprescription Drugs. 6th.ed Washington: American Pharmaceutical Association, 1979. Textbook.